PASCAL FAMILY

How I can find information about my great great grandfather, born in France and then he lived in Martinique until 1830 aprox. His name was Etanislao Pascal. He had two childrens, Etanislao and Emilio. Etanislao married with Leocadia Rodriguez. He had for childrens, Epifanio, Agustin, Juana Cirila and Maria Dominga. The childrens born in La Vega I think, because Epifanio Married with Cristobalina Ureña in this city having 5 childrens. Two oh them: Cristobalina and María Luisa Pascal.

That is the sum total of what I know of his background.

What is the next step to find out any information, like parents or where he lived.